Formwork supporting structure for construction of four-side-closed hollow box girder

Abstract

The utility model relates to the technical field of bridge formwork construction, and discloses a formwork supporting structure for construction of a four-side-closed hollow box girder, which comprises a formwork support, a box girder and a formwork, and the box girder is of a four-side-closed hollow structure; the formwork support is erected on the top of the box girder and used for laying a formwork. And the supporting and reinforcing assembly is of a triangular supporting structure and is located in the box girder, the bottom end of the supporting and reinforcing assembly is supported on the inner walls of the two opposite sides of the box girder, and the top end of the supporting and reinforcing assembly is installed on the formwork support. The formwork support is erected on the top of the box girder and used for laying the formwork, meanwhile, the supporting and reinforcing assembly of a triangular supporting structure is arranged in the box girder, the bottom end of the supporting and reinforcing assembly is supported on the inner walls of the two opposite sides of the box girder, the top end of the supporting and reinforcing assembly is installed on the formwork support, and a stable mechanical structure is formed through the vertically-matched supporting mode. And the stability of the whole template supporting structure is effectively enhanced.

Description

Technical Field

[0001] This utility model relates to the field of bridge formwork construction technology, and in particular to a formwork support structure for the construction of a four-sided enclosed hollow box girder. Background Technology

[0002] A box girder (also known as a tubular girder) is a type of bridge whose main beam is composed of hollow box-shaped girders. Box girders are typically made of prestressed concrete, structural steel, or a composite material of steel and reinforced concrete. The cross-section of the box girder is usually rectangular or trapezoidal.

[0003] Traditional box girder support structures typically consist of vertical and horizontal supports. However, before installing the support structure, the foundation must be compacted and leveled to ensure sufficient load-bearing capacity. Then, vertical supports are installed one by one according to the design height of the box girder. Finally, after the vertical supports have been installed to a certain height, the horizontal supports are installed.

[0004] However, traditional support structures mainly rely on connectors to ensure the connection strength between components. When subjected to large construction loads or unexpected vibrations, the connectors are prone to loosening, leading to a decrease in the overall stability of the support structure. This results in insufficient load-bearing capacity of the box girder and increases construction safety risks. Secondly, existing support systems require a large amount of materials such as steel pipes, scaffolding, and support rods. The installation and dismantling process is relatively cumbersome, requiring a large amount of manual labor for the handling, assembly, and adjustment of components. This results in a long construction cycle, which is not conducive to improving construction efficiency and increases project costs. Utility Model Content

[0005] The purpose of this utility model is to provide a formwork support structure for the construction of a four-sided enclosed hollow box girder, so as to solve the problem of insufficient load-bearing capacity of the box girder due to insufficient support in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A formwork support structure for the construction of a four-sided enclosed hollow box girder includes: a formwork support and a box girder, and a formwork, wherein the box girder is a four-sided enclosed and hollow structure; the formwork support is erected on the top of the box girder and is used to lay the formwork; a support and reinforcement component, wherein the support and reinforcement component is a triangular support structure, the support and reinforcement component is located inside the box girder, and the bottom end of the support and reinforcement component is supported on the inner walls of opposite sides of the box girder, and the top end of the support and reinforcement component is installed on the formwork support.

[0008] Based on the aforementioned technical means, the formwork support is erected on top of the box girder and used for laying the formwork. At the same time, a triangular support structure is installed inside the box girder, with its bottom end supported on the inner walls of opposite sides of the box girder and its top end installed on the formwork support. This upper and lower support method forms a stable mechanical structure, effectively enhancing the stability of the entire formwork support structure. It can better withstand various loads generated during construction, reduce the risk of structural deformation and collapse, and ensure construction safety. Moreover, the components of the formwork support structure are relatively clear, and the installation and dismantling of the formwork support and support reinforcement components are relatively simple and highly operable. This is conducive to improving the convenience of construction, reducing construction difficulty and labor intensity, and reducing construction time and labor costs.

[0009] Secondly, the support and reinforcement components of the triangular support structure have good mechanical properties, which can evenly transfer the load borne by the formwork support to the inner wall of the box girder, disperse stress concentration, and avoid damage to the formwork and box girder structure caused by excessive local stress, thereby ensuring the normal use of the formwork and the forming quality of the box girder.

[0010] Furthermore, the template support includes a first keel and a second keel. The first keel is installed on the top of the box girder and extends along a first direction. The second keel is installed on the first keel and extends along a second direction. The first direction and the second direction are perpendicular to each other.

[0011] Based on the aforementioned technical means, the mutually perpendicular first and second keels form a regular grid structure, providing precise positioning and guidance for the laying of the formwork, so that construction workers can accurately install the formwork and ensure the flatness and positional accuracy of the formwork. Moreover, the vertical connection of the first and second keels gives the formwork support good rigidity and stability in two mutually perpendicular directions, which can effectively resist the external forces in various directions, such as horizontal forces, vertical forces and torques, so that the entire formwork support forms an integral load-bearing structure, improving the structure's resistance to deformation and overall stability, and reducing local deformation or shaking caused by uneven force during construction.

[0012] Furthermore, there are multiple first keels, each of which is installed at equal intervals along the second direction on the top of the box girder, and each of the first keels is parallel to each other.

[0013] Based on the aforementioned technical means, multiple first keels are installed parallel to each other and at equal intervals along the second direction, which enables the load transferred from the formwork to be evenly distributed on the top of the box girder, avoiding the concentration of load in local areas. This reduces the possibility of excessive local stress on the top of the box girder, which is beneficial to ensuring the safety and stability of the box girder structure. The parallel arrangement allows each first keel to work collaboratively under load, without interference or misalignment between them, enhancing the stability and rigidity of the entire formwork support in the first direction. Secondly, the equidistant parallel first keels provide uniform and stable support points for the formwork, avoiding deformation or dents caused by uneven support, thus ensuring the flatness of the formwork and consequently the flatness and smoothness of the box girder concrete surface.

[0014] Furthermore, the template support also includes multiple keel support seats, which are evenly installed on the inner walls of opposite sides of the box girder along the second direction, and each of the keel support seats on the inner walls of the two sides corresponds to each other; each of the first keels is installed on the corresponding two keel support seats at both ends.

[0015] According to the above-mentioned technical means, the two ends of the first keel are respectively installed on corresponding keel support seats, so that the load of the first keel can be evenly transferred to the inner walls of both sides of the box girder through the keel support seats. This avoids excessive local stress that may be caused by the first keel directly contacting the top of the box girder, improves the reliability and stability of the support, and enhances the formwork support's ability to bear construction loads. In addition, the keel support seats are evenly installed along the second direction and correspond to each other in pairs, providing precise positioning points for the installation of the first keel, so that construction personnel can quickly and accurately place the first keel on the corresponding keel support seats, thus improving installation efficiency.

[0016] Furthermore, the number of the support and reinforcement components is the same as the number of the first keel, each of the support and reinforcement components is equidistantly distributed along the second direction, and the bottom end of each of the support and reinforcement components is supported on the inner walls of opposite sides of the box girder, and the top end of each of the support and reinforcement components is installed on each of the first keels.

[0017] Based on the aforementioned technical means, the number of supporting and reinforcing components is the same as the number of the first keel and corresponds one-to-one, providing support for the first keel and further enhancing its stability. Moreover, the bottom of each supporting and reinforcing component is firmly supported on the inner walls of both sides of the box girder, and the top is connected to the first keel. This allows the load borne by the first keel to be transferred more directly and effectively to the inner walls of the opposite sides of the box girder, making the stress on the entire formwork support structure more uniform, avoiding excessive local stress, fully utilizing the load-bearing capacity of the box girder structure, and ensuring the safety and stability of the structure during construction.

[0018] Furthermore, each of the aforementioned support and reinforcement components includes a first diagonal brace and a second diagonal brace, with one end of the first diagonal brace and one end of the second diagonal brace respectively supported on the inner walls of opposite sides of the box girder; the other ends of the first diagonal brace and the other ends of the second diagonal brace are connected, and the other ends of the first diagonal brace and the other ends of the second diagonal brace are both installed on each of the first keels to form a triangular support structure.

[0019] Based on the aforementioned technical means, utilizing the stability principle of triangles, the triangular support structure formed by the first and second diagonal braces can greatly improve the stability and load-bearing capacity of the support and reinforcement components. It can effectively transfer the load borne by the first keel along the first and second diagonal braces to the inner walls of both sides of the box girder, avoiding localized stress concentration, fully utilizing the load-bearing capacity of the box girder structure, and improving the reliability of the entire formwork support structure. Secondly, the triangular support structure makes reasonable use of space inside the box girder, providing effective support without excessively occupying internal space. This provides a relatively spacious working area for other construction operations inside the box girder (such as rebar tying and prestressed duct installation), facilitating smooth construction.

[0020] Furthermore, each of the aforementioned support and reinforcement components also includes a first diagonal brace base and a second diagonal brace base. The first diagonal brace base and the second diagonal brace base are respectively installed on the inner walls of opposite sides of the box girder, and one end of the first diagonal brace rod is connected to the first diagonal brace base, and one end of the second diagonal brace rod is connected to the second diagonal brace base, so that one end of the first diagonal brace rod and one end of the second diagonal brace rod are respectively supported on the inner walls of opposite sides of the box girder through the first diagonal brace base and the second diagonal brace base.

[0021] Based on the aforementioned technical means, the first and second diagonal brace bases provide a more stable connection foundation for the first and second diagonal braces. Compared to the direct connection between the first and second diagonal braces and the inner wall of the box girder, adding the first and second diagonal brace bases expands the connection area, making the force transmission more uniform and reducing local stress concentration. This improves the reliability of the connection between the first and second diagonal braces and the inner wall of the box girder, ensuring that the entire support and reinforcement assembly will not easily loosen or fall off when bearing loads. Secondly, the design of the first and second diagonal brace bases makes the installation of the diagonal braces more convenient. Construction personnel can first accurately install the first and second diagonal brace bases at the predetermined positions on the inner wall of the box girder, and then connect the first diagonal brace to the first diagonal brace base and the second diagonal brace to the second diagonal brace base. This improves installation efficiency, ensures the installation position accuracy of the first and second diagonal brace bases, and facilitates the rapid and accurate installation of the entire support and reinforcement assembly, ensuring the overall quality of the support structure.

[0022] Furthermore, there are multiple second keels, each of which is installed equidistantly on the first keel along the first direction, and each of the second keels is parallel to each other.

[0023] Based on the aforementioned technical means, multiple second joists are installed parallel to each other and at equal intervals along the second direction, which enables the load transferred from the formwork to be evenly distributed on the top of the box girder, avoiding the concentration of load in local areas. This reduces the possibility of excessive local stress on the top of the box girder, which is beneficial to ensuring the safety and stability of the box girder structure. The parallel arrangement allows each second joist to work collaboratively under load, without interfering with or misaligning with each other, enhancing the stability and rigidity of the entire formwork support in the second direction. Furthermore, the equidistant parallel second joists provide uniform and stable support points for the formwork, avoiding deformation or dents caused by uneven support, thus ensuring the flatness of the formwork and consequently the flatness and smoothness of the box girder concrete surface.

[0024] Furthermore, the template support also includes multiple limiting members, the number of which is the same as that of the second keel; each of the limiting members is equidistantly installed on the first keel along the first direction, and each of the limiting members is used to connect with each of the second keels to prevent each of the second keels from shifting.

[0025] Based on the above technical means, by connecting the second keel to the first keel with the limiting component and restricting the displacement of the second keel, the structural stability of the entire formwork support can be ensured. This prevents the second keel from shifting arbitrarily when subjected to external forces, allowing the formwork support to better bear the weight from the formwork and concrete, ensuring the stability of the formwork structure during construction, reducing problems such as formwork damage and deformation caused by keel displacement and grout leakage during concrete pouring, thereby reducing material waste and loss.

[0026] Furthermore, each of the limiting components includes a first limiting plate and a second limiting plate, the first limiting plate and the second limiting plate are disposed opposite to each other on the first keel, and the distance between the first limiting plate and the second limiting plate is adapted to the size of each second keel. Each second keel is installed between the first limiting plate and the second limiting plate to prevent each second keel from shifting.

[0027] Based on the aforementioned technical means, the first and second limiting plates are arranged opposite each other with a spacing adapted to the size of the second keel, which can provide precise limiting space for the second keel. This can effectively prevent the second keel from shifting in any direction, ensuring its accurate position in the formwork support, thereby ensuring the stability and precision of the entire formwork structure and providing a reliable support foundation for box girder construction. Secondly, the oppositely arranged limiting plates provide clear guidance for the installation of the second keel, greatly improving installation efficiency and reducing construction time and labor costs.

[0028] The beneficial effects achieved by this utility model are:

[0029] 1. The formwork support is erected on top of the box girder and used for laying the formwork. At the same time, a triangular support structure is installed inside the box girder for reinforcement. Its bottom end is supported on the inner walls of opposite sides of the box girder, and its top end is installed on the formwork support. This upper and lower support method forms a stable mechanical structure, which effectively enhances the stability of the entire formwork support structure. It can better withstand various loads generated during construction, reduce the risk of structural deformation and collapse, and ensure construction safety. Moreover, the components of the formwork support structure are relatively clear, and the installation and dismantling of the formwork support and reinforcement components are relatively simple and easy to operate. This is conducive to improving the convenience of construction, reducing construction difficulty and labor intensity, and reducing construction time and labor costs.

[0030] 2. The support and reinforcement components of the triangular support structure have good mechanical properties, which can evenly transfer the load borne by the formwork support to the inner wall of the box girder, disperse stress concentration, and avoid damage to the formwork and box girder structure caused by excessive local stress, thereby ensuring the normal use of the formwork and the forming quality of the box girder. Attached Figure Description

[0031] Figure 1 This is a top view of the entire utility model;

[0032] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0033] Figure 3 for Figure 2 A sectional view of AA;

[0034] Wherein, 1-template bracket; 11-first keel; 12-second keel; 13-keel support base; 14-limiting component; 141-first limiting plate; 142-first limiting plate;

[0035] 2-Box girder;

[0036] 3- Template;

[0037] 4-Support and reinforcement components; 41-First diagonal brace; 42-Second diagonal brace; 43-First diagonal brace base; 44-Second diagonal brace base.

[0038] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The same or similar reference numerals correspond to the same or similar components. The terms describing positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. Detailed Implementation

[0039] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific embodiments should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below with reference to the accompanying drawings of the embodiments of this application. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.

[0041] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0042] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0043] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0044] The technical solution of this embodiment will be described in detail below with reference to the accompanying drawings.

[0045] like Figure 3As shown, this embodiment provides a formwork support structure for the construction of a four-sided enclosed hollow box girder, including: a formwork support 1, a box girder 2, and a formwork 3. The box girder 2 is a four-sided enclosed and hollow structure. The formwork support 1 is erected on the top of the box girder 2 and is used to lay the formwork 3. A support and reinforcement component 4 is a triangular support structure located inside the box girder 2, with the bottom end of the support and reinforcement component 4 supported on the inner walls of opposite sides of the box girder 2, and the top end of the support and reinforcement component 4 installed on the formwork support 1.

[0046] During the construction of box girder 2, firstly, according to the design requirements, the supporting and reinforcing components 4 are evenly supported on the opposite sides of the inner wall of box girder 2; secondly, the formwork support 1 is installed inside box girder 2, and the top of the supporting and reinforcing components 4 is fixed to the formwork support 1 by welding; then, the formwork 3 is laid on the surface of the formwork support 1, and the joints between the formwork are checked to ensure they are flat, so as to avoid uneven joints affecting the construction effect; finally, concrete is poured on the formwork 3 to complete the capping of box girder 2.

[0047] The formwork support 1 is erected on top of the box girder 2 and used to lay the formwork 3. At the same time, a triangular support reinforcement component 4 is set inside the box girder 2. Its bottom end is supported on the inner walls of opposite sides of the box girder 2, and its top end is installed on the formwork support 1. This upper and lower support method forms a stable mechanical structure, which effectively enhances the stability of the entire formwork support 1 structure. It can better withstand various loads generated during construction, reduce the risk of structural deformation and collapse, and ensure construction safety. Moreover, the components of the formwork support 1 structure are relatively clear, and the installation and dismantling of the formwork support 1 and the support reinforcement component 4 are relatively simple and easy to operate. This is conducive to improving the convenience of construction, reducing construction difficulty and labor intensity, and reducing construction time and labor costs.

[0048] Secondly, the support and reinforcement component 4 of the triangular support structure has good mechanical properties, which can evenly transfer the load borne by the template support 1 to the inner wall of the box girder 2, disperse stress concentration, and avoid damage to the template and box girder 2 structure caused by excessive local stress, thereby ensuring the normal use of the template 3 and the forming quality of the box girder.

[0049] like Figure 1 As shown, in this embodiment, the template support 1 includes a first keel 11 and a second keel 12. The first keel 11 is installed on the top of the box beam 2 and extends along a first direction; the second keel 12 is installed on the first keel 11 and extends along a second direction; the first direction and the second direction are perpendicular to each other.

[0050] The first keel 11 and the second keel 12, which are perpendicular to each other, form a regular grid structure, providing precise positioning and guidance for the laying of the template 3, so that the construction personnel can accurately install the template 3 and ensure the flatness and positional accuracy of the template 3. Moreover, the vertical connection of the first keel 11 and the second keel 12 gives the template support 1 good rigidity and stability in two mutually perpendicular directions, which can effectively resist the external forces in various directions, such as horizontal forces, vertical forces and torques, so that the entire template support 1 forms an integral load-bearing structure, which improves the deformation resistance and overall stability of the structure and reduces local deformation or shaking caused by uneven force during construction.

[0051] like Figure 1 and Figure 2 As shown, in this embodiment, the first keel 11 is a plurality of them, and each first keel 11 is installed at equal intervals along the second direction on the top of the box beam 2, and each first keel 11 is parallel to each other.

[0052] Multiple first keels 11 are installed parallel to each other and at equal intervals along the second direction, which enables the load transferred from the formwork 3 to be evenly distributed on the top of the box girder 2, avoiding the concentration of load in local areas, thereby reducing the situation of excessive local stress on the top of the box girder 2, which is conducive to ensuring the safety and stability of the box girder 2 structure. The parallel arrangement allows each first keel 11 to work together under stress without interfering with or misaligning with each other, enhancing the stability and rigidity of the entire formwork support 1 in the first direction. Secondly, the equidistant parallel first keels 11 provide uniform and stable support points for the formwork, avoiding deformation or dents of the formwork 3 caused by uneven support, thereby ensuring the flatness of the formwork 3, and thus ensuring the flatness and smoothness of the concrete surface of the box girder 2.

[0053] like Figure 2 and Figure 3 As shown, in this embodiment, the template support 1 also includes a plurality of keel support seats 13. The plurality of keel support seats 13 are evenly installed on the inner walls of opposite sides of the box beam 2 along the second direction, and each keel support seat 13 on the inner walls of the two sides corresponds to each other; the two ends of each first keel 11 are respectively installed on the two corresponding keel support seats 13.

[0054] The first keel 11 is installed on its two ends on corresponding keel support seats 13, so that the load of the first keel 11 can be evenly transferred to the inner walls of both sides of the box girder 2 through the keel support seats 13. This avoids excessive local stress that may be caused by the first keel 11 directly contacting the top of the box girder 2, improves the reliability and stability of the support, and enhances the formwork support 1's ability to bear construction loads. In addition, the keel support seats 13 are evenly installed along the second direction and correspond to each other in pairs, providing precise positioning points for the installation of the first keel 11, so that construction personnel can quickly and accurately place the first keel 11 on the corresponding keel support seats 13, thus improving installation efficiency.

[0055] like Figure 1 and Figure 2 As shown, in this embodiment, the number of support and reinforcement components 4 is the same as the number of first keels 11. Each support and reinforcement component 4 is equidistantly distributed along the second direction, and the bottom of each support and reinforcement component 4 is supported on the inner walls of opposite sides of the box girder 2. The top of each support and reinforcement component 4 is installed on each first keel 11.

[0056] The number of supporting and reinforcing components 4 is the same as the number of first keels 11 and corresponds one-to-one, providing support for the first keels 11 and further enhancing their stability. The bottom ends of each supporting and reinforcing component 4 are firmly supported on the inner walls of both sides of the box girder 2, and the top ends are connected to the first keels 11. This allows the load borne by the first keels 11 to be transferred more directly and effectively to the inner walls of the opposite sides of the box girder 2, making the stress on the entire formwork support structure more uniform, avoiding excessive local stress, fully utilizing the load-bearing capacity of the box girder 2 structure, and ensuring the safety and stability of the structure during construction.

[0057] like Figure 3 As shown, in this embodiment, each support and reinforcement component 4 includes a first diagonal brace 41 and a second diagonal brace 42. One end of the first diagonal brace 41 and one end of the second diagonal brace 42 are respectively supported on the inner walls of opposite sides of the box girder 2. The other end of the first diagonal brace 41 and the other end of the second diagonal brace 42 are connected to each other, and the other ends of the first diagonal brace 41 and the other ends of the second diagonal brace 42 are both installed on each first keel 11 to form a triangular support structure.

[0058] Utilizing the stability principle of triangles, the triangular support structure formed by the first diagonal brace 41 and the second diagonal brace 42 can greatly improve the stability and load-bearing capacity of the support and reinforcement components. It can effectively transfer the load borne by the first keel 11 to the inner walls of both sides of the box girder 2 along the first diagonal brace 41 and the second diagonal brace 42, avoiding local stress concentration, giving full play to the load-bearing capacity of the box girder 2 structure, and improving the reliability of the entire formwork support structure. Secondly, the triangular support structure makes reasonable use of space inside the box girder 2. While providing effective support, it does not occupy too much space inside the box girder 2, providing a relatively spacious working space for other construction operations inside the box girder 2 (such as rebar tying, prestressed pipe installation, etc.), which is conducive to the smooth progress of construction.

[0059] like Figure 3 As shown in this embodiment, each support and reinforcement component 4 further includes a first diagonal brace base 43 and a second diagonal brace base 44. The first diagonal brace base 43 and the second diagonal brace base 44 are respectively installed on the inner walls of opposite sides of the box girder 2. One end of the first diagonal brace rod 41 is connected to the first diagonal brace base 43, and one end of the second diagonal brace rod 42 is connected to the second diagonal brace base 44, so that one end of the first diagonal brace rod 41 and one end of the second diagonal brace rod 42 are respectively supported on the inner walls of opposite sides of the box girder 2 through the first diagonal brace base 43 and the second diagonal brace base 44.

[0060] The first diagonal brace base 43 and the second diagonal brace base 44 provide a more stable connection foundation for the first diagonal brace 41 and the second diagonal brace 42. Compared with the first diagonal brace 41 and the second diagonal brace 42 being directly connected to the inner wall of the box girder 2, adding the first diagonal brace base 43 and the second diagonal brace base 44 can expand the connection area, make the force transmission more uniform, reduce local stress concentration, thereby improving the reliability of the connection between the first diagonal brace 41 and the second diagonal brace 42 and the inner wall of the box girder 2, and ensuring that the entire support and reinforcement assembly will not easily loosen or fall off when bearing load; secondly, the first The design of the first diagonal brace base 43 and the second diagonal brace base 44 makes the installation of the diagonal brace more convenient. Construction workers can first accurately install the first diagonal brace base 43 and the second diagonal brace base 44 at the predetermined positions on the inner wall of the box girder 2, and then connect the first diagonal brace 41 to the first diagonal brace base 43 and the second diagonal brace 42 to the second diagonal brace base 44. This can improve the installation efficiency, ensure the installation position accuracy of the first diagonal brace base 43 and the second diagonal brace base 44, and facilitate the rapid and accurate installation of the entire support and reinforcement component, thus ensuring the overall quality of the support structure.

[0061] like Figure 1 and Figure 2 As shown, in this embodiment, there are multiple second keels 12, each second keel 12 is installed equidistantly on the first keel 11 along the first direction, and each second keel 12 is parallel to each other.

[0062] Multiple second joists 12 are installed parallel to each other and at equal intervals along the second direction, which enables the load transferred from the formwork 3 to be evenly distributed on the top of the box girder 2, avoiding the concentration of load in local areas, thereby reducing the situation of excessive local stress on the top of the box girder 2, which is conducive to ensuring the safety and stability of the box girder 2 structure. The parallel arrangement allows each second joist 12 to work together under stress without interfering with or misaligning with each other, enhancing the stability and rigidity of the entire formwork support 1 in the second direction. Secondly, the equidistant parallel second joists 12 provide uniform and stable support points for the formwork, avoiding deformation or dents of the formwork 3 caused by uneven support, thereby ensuring the flatness of the formwork 3, and thus ensuring the flatness and smoothness of the concrete surface of the box girder 2.

[0063] like Figure 3 As shown, in this embodiment, the template support 1 also includes a plurality of limiting members 14, the number of which is the same as that of the second keel 12; each limiting member 14 is installed at equal intervals along the first direction on the first keel 11, and each limiting member 14 is used to connect with each of the second keels 12 to prevent each of the second keels 12 from shifting.

[0064] By connecting the second keel 42 to the first keel 11 with the limiting member 14 and restricting the offset of the second keel 12, the structural stability of the entire formwork support 1 can be ensured. This prevents the second keel 12 from shifting arbitrarily when subjected to external forces, allowing the formwork support 1 to better bear the weight from the formwork 3 and concrete, ensuring the stability of the formwork structure during construction, reducing problems such as damage and deformation of the formwork 3 and leakage of grout during concrete pouring caused by the offset of the second keel 12, thereby reducing material waste and loss.

[0065] like Figure 3 As shown, in this embodiment, each limiting member 14 includes a first limiting plate 141 and a second limiting plate 142. The first limiting plate 141 and the second limiting plate 142 are disposed opposite to each other on the first keel 11, and the distance between the first limiting plate 141 and the second limiting plate 142 is adapted to the size of each second keel 12. Each second keel 12 is installed between the first limiting plate 141 and the second limiting plate 142 to prevent each second keel 12 from shifting.

[0066] The first limiting plate 141 and the second limiting plate 142 are arranged opposite each other and the spacing is adapted to the size of the second keel 12. This provides a precise limiting space for the second keel 12, which can effectively prevent the second keel 12 from shifting in all directions and ensure its accurate position in the formwork support 1. This ensures the stability and accuracy of the entire formwork structure and provides a reliable support foundation for the construction of the box girder 2. Secondly, the oppositely arranged limiting plates 141 and 142 provide a clear guide for the installation of the second keel 12, which greatly improves the installation efficiency and reduces construction time and labor costs.

[0067] The specific steps for installing the template support structure designed above into a four-sided enclosed hollow box girder are as follows:

[0068] 1. Install the diagonal brace base: During the construction of box girder 2, firstly, according to the design requirements, install the first diagonal brace base 43 and the second diagonal brace base 44 on opposite sides of the inner wall of box girder 2, with a spacing of 1.2 meters.

[0069] 2. Install diagonal bracing rods: Connect one end of each first diagonal bracing rod 41 to the first diagonal bracing base 43 with high-strength bolts, and connect one end of each second diagonal bracing rod 42 to the second diagonal bracing base 44 with high-strength bolts. Then connect the other end of the first diagonal bracing rod 41 to the other end of the second diagonal bracing rod 42, so that the first diagonal bracing rod 41 and the second diagonal bracing rod 42 form a triangular support structure.

[0070] 3. Crossbeam arrangement: According to the width of the second keel 12, weld the first limiting plate 141 and the second limiting plate 142 to the first keel 11; along the width direction of the bridge, i.e. the first direction, weld the two ends of the first keel 11 to the opposite sides of the inner wall of the box girder 2, at this time, the side with the limiting plate 14 is facing upward; finally, weld the connection between the first diagonal brace 41 and the second diagonal brace 42 to the first keel 11.

[0071] 4. Longitudinal beam arrangement: Along the length direction of the bridge, i.e. the second direction, the second keel 12 is placed in the groove formed by the first limiting plate 141 and the second limiting plate 142, so that the first keel 11 and the second keel 12 form a template support 1.

[0072] 5. Laying template 3: Lay template 3 on template support 1, and ensure that the joints between templates are flat to avoid uneven joints affecting the construction effect.

[0073] Finally, concrete can be poured onto formwork 3 to complete the capping of box girder 2.

[0074] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made based on the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A formwork support structure for the construction of a four-sided enclosed hollow box girder, characterised in that, The utility model relates to a box girder formwork support structure, comprising: a box girder (2) which is a four-sided closed and hollow structure; a formwork support (1) which is erected on the top of the box girder (2) and is used for laying a formwork (3); and a support reinforcement assembly (4) which is a triangular support structure, is located in the box girder (2), and has its bottom end supported on the inner walls of the opposite sides of the box girder (2) and its top end mounted on the formwork support (1). The formwork support (1) comprises a first keel (11) and a second keel (12), the first keel (11) is mounted on the top of the box girder (2) and extends in a first direction, and the second keel (12) is mounted on the first keel (11) and extends in a second direction, the first direction being perpendicular to the second direction.

2. The formwork support structure for the construction of a four-sided enclosed hollow box girder according to claim 1, wherein, The first keel (11) is provided in a plurality of pieces, each of the first keels (11) is mounted on the top of the box girder (2) at equal distances in the second direction and is parallel to each other.

3. The formwork support structure for the construction of a four-sided enclosed hollow box girder according to claim 2, wherein, The formwork support (1) further comprises a plurality of keel support seats (13) which are uniformly mounted on the inner walls of the opposite sides of the box girder (2) at equal distances in the second direction and correspond to each other in pairs, and each of the first keels (11) is mounted on two corresponding keel support seats (13) at two ends thereof.

4. The formwork support structure for the construction of a four-sided enclosed hollow box girder according to claim 3, wherein, The support reinforcement assembly (4) is provided in a number equal to that of the first keels (11), each of the support reinforcement assemblies (4) is distributed at equal distances in the second direction, the bottom end of each of the support reinforcement assemblies (4) is supported on the inner walls of the opposite sides of the box girder (2), and the top end of each of the support reinforcement assemblies (4) is mounted on each of the first keels (11).

5. The formwork support structure for the construction of a four-sided enclosed hollow box girder according to claim 3, wherein, Each of the support reinforcement assemblies (4) comprises a first inclined support rod (41) and a second inclined support rod (42), one end of the first inclined support rod (41) and one end of the second inclined support rod (42) are supported on the inner walls of the opposite sides of the box girder (2) respectively, the other end of the first inclined support rod (41) and the other end of the second inclined support rod (42) are connected, and the other end of the first inclined support rod (41) and the other end of the second inclined support rod (42) are mounted on each of the first keels (11) to form a triangular support structure.

6. The formwork support structure for the construction of a four-sided enclosed hollow box girder according to claim 5, wherein, ​ 7. The formwork support structure for the construction of a four-sided enclosed hollow box girder according to claim 6, wherein, Each of the support reinforcement assemblies (4) further comprises a first inclined support base (43) and a second inclined support base (44), the first inclined support base (43) and the second inclined support base (44) are respectively installed on the inner walls of the opposite sides of the box girder (2), and one end of the first inclined support rod (41) is connected with the first inclined support base (43), and one end of the second inclined support rod (42) is connected with the second inclined support base (44), so that one end of the first inclined support rod (41) and one end of the second inclined support rod (42) are respectively supported on the inner walls of the opposite sides of the box girder (2) through the first inclined support base (43) and the second inclined support base (44).

8. The formwork support structure for the construction of a four-sided enclosed hollow box girder according to claim 2, wherein, The second keels (12) are multiple in number, each of the second keels (12) is installed on the first keel (11) equidistantly along the first direction, and each of the second keels (12) is parallel to each other.

9. The formwork support structure for the construction of a four-sided enclosed hollow box girder according to claim 8, wherein, The formwork support (1) further comprises multiple limiting pieces (14), the number of the limiting pieces (14) is the same as that of the second keels (12); each of the limiting pieces (14) is installed on the first keel (11) equidistantly along the first direction, and each of the limiting pieces (14) is used for being connected with each of the second keels (12) to prevent each of the second keels (12) from deviating.

10. The formwork support structure for the construction of a four-sided enclosed hollow box girder according to claim 9, wherein, Each of the limiting pieces (14) comprises a first limiting plate (141) and a second limiting plate (142), the first limiting plate (141) and the second limiting plate (142) are oppositely arranged on the first keel (11), and the distance between the first limiting plate (141) and the second limiting plate (142) is adapted to the size of each of the second keels (12), and each of the second keels (12) is installed between the first limiting plate (141) and the second limiting plate (142) to prevent each of the second keels (12) from deviating.

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